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Modelling microchannel - inlet boundary condition

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Old   September 3, 2022, 05:47
Default Modelling microchannel - inlet boundary condition
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Delika Weragoda
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How would you define the inlet boundary condition in a vertically oriented microchannel? I've seen many use either a constant velocity or mass flow rate but not a pressure BC. Can't it be defined as a pressure inlet BC, cause I'm trying to determine the velocity of capillary rise? (This probably might be more of a theory question than Fluent)

Trying to wrap my head around this, but looks like I'm not getting anywhere. Any help would be much appreciated.
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Old   September 6, 2022, 15:38
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You can set a pressure inlet or a pressure outlet with backflow Water or the fluid that is supposed to be sucked in by capillarity. Might be that you need to patch a little bit of liquid so that it starts "sucking" it in.

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boundary conditions, capillary rise, inlet, micro channel, velocity

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